Barcelona move back up to second and to within four points of La Liga leaders Atletico Madrid after putting six past Real Sociedad.
Lionel Messi will dominate the headlines for scoring twice on a record-breaking night, but it was a devastating all-round performance from the Catalan club.
Sergino Dest got his first two La Liga goals for the club after Antoine Griezmann opened the scoring on his birthday, while Ousmane Dembele also got involved with an impressive strike.
FULL-TIME
Real Sociedad 1-6 Barcelona
Emphatic!
Lionel Messi scores twice in his club-record 768th appearance for Barcelona, who thrash top-four hopefuls Real Sociedad.
YELLOW CARD
Real Sociedad 1-6 Barcelona
We are into the third minute of injury time and Carlos Fernandez is cautioned. We just have moments left now.
Post update
Real Sociedad 1-6 Barcelona
There was a VAR check in there for some reason, a foul in the build-up.
In the end, the goal stands.
We will have four minutes of added time now.
GOAL - Real Sociedad 1-6 Barcelona
Lionel Messi
This goal is a thing of beauty.
Barcelona ping the ball around the edge of the area.
Lionel Messi is involved early, shifting possession to the left and the Argentine is there to finish it after being found by the excellent Jordi Alba.
Post update
Real Sociedad 1-5 Barcelona
Real Sociedad look keen to add a bit of respectability to the scoreline.
Carlos Fernandez calls Marc-Andre ter Stegen into action. It's easily smothered.
SUBSTITUTION
Real Sociedad 1-5 Barcelona
Sergino Dest will not be going for his hat-trick as he makes way for Trincao.
Riqui Puig is also on for Barca, with opening scorer Antoine Griezmann coming off.
SUBSTITUTION
Real Sociedad 1-5 Barcelona
More changes for Real Sociedad now.
Modibo Sagnan and Jon Bautista and introduced, with Igor Zubeldia and Alexander Isak replaced.
Post update
Real Sociedad 1-5 Barcelona
We have managed to go a few minutes without a goal now..
This comprehensive win will see Barcelona move back up to second place and to within four points of leaders Atletico Madrid.
SUBSTITUTION
Real Sociedad 1-5 Barcelona
Ousmane Dembele's night is done for Barcelona. He is replaced by Martin Braithwaite.
Just over 10 minutes remaining at Reale Arena.
GOAL - Real Sociedad 1-5 Barcelona
Ander Barrenetxea
The hosts have one back!
Sure, Barcelona have five but this from Ander Barrenetxea is just about the pick of the night.
He beats Marc-Andre ter Stegen with sheer power.
Post update
Real Sociedad 0-5 Barcelona
After Dembele added a fifth, Sociedad went for another change.
Carlos Fernandez came on for Martín Zubimendi.
GOAL - Real Sociedad 0-5 Barcelona
Ousmane Dembele
This one WILL count!
Ousmane Dembele has been particularly bright in the second half.
He picks the ball up a long way out and runs at Real Sociedad's defence.
He carves out space to shoot and beats Alex Remiro with a fine low finish into the far corner.
SUBSTITUTION
Real Sociedad 0-4 Barcelona
Barca now with their first change.
Ilaix Moriba comes on to replace Pedri.
Post update
Real Sociedad 0-4 Barcelona
It's a tight call, but ultimately he was just offside.
The goal doesn't count.
Video Assistant Referee
Real Sociedad 0-4 Barcelona
Could Ousmane Dembele have the goal he craves?
He sprints away and finishes clinically. But did he go too early?
We have ourselves a VAR check...
Post update
Real Sociedad 0-4 Barcelona
Ousmane Dembele goes for something spectacular... but just falls back to earth in a heap.
A neat ball is lifted into the area and Dembele gets himself in position to try an overhead kick. Problem is, a Real Sociedad head gets to the ball first and the Frenchman is left swinging at air.
SUBSTITUTION
Real Sociedad 0-4 Barcelona
Real Sociedad with a double substitution.
Andoni Gorosabel is replaced by Ander Barrenetxea, while Adan Januzaj comes on for Portu.
GOAL - Real Sociedad 0-4 Barcelona
Lionel Messi
Lionel Messi marks his record 768th Barcelona appearance with a goal. Of course he has!
Sergio Busquet threads the ball through the middle and Messi waits for the bounce and pokes it home.
GOAL - Real Sociedad 0-3 Barcelona
Sergino Dest
Sergino Dest again!
Jordi Alba forces his way into the area, takes the ball to the byeline and cuts it back for Dest who drills it home.
Live Reporting
Andrew Aloia
All times stated are UK
Latest PostAdios
FT: Real Sociedad 1-6 Barcelona.
That's it from us tonight!
Barcelona move back up to second and to within four points of La Liga leaders Atletico Madrid after putting six past Real Sociedad.
Lionel Messi will dominate the headlines for scoring twice on a record-breaking night, but it was a devastating all-round performance from the Catalan club.
Sergino Dest got his first two La Liga goals for the club after Antoine Griezmann opened the scoring on his birthday, while Ousmane Dembele also got involved with an impressive strike.
FULL-TIME
Real Sociedad 1-6 Barcelona
Emphatic!
Lionel Messi scores twice in his club-record 768th appearance for Barcelona, who thrash top-four hopefuls Real Sociedad.
YELLOW CARD
Real Sociedad 1-6 Barcelona
We are into the third minute of injury time and Carlos Fernandez is cautioned. We just have moments left now.
Post update
Real Sociedad 1-6 Barcelona
There was a VAR check in there for some reason, a foul in the build-up.
In the end, the goal stands.
We will have four minutes of added time now.
GOAL - Real Sociedad 1-6 Barcelona
Lionel Messi
This goal is a thing of beauty.
Barcelona ping the ball around the edge of the area.
Lionel Messi is involved early, shifting possession to the left and the Argentine is there to finish it after being found by the excellent Jordi Alba.
Post update
Real Sociedad 1-5 Barcelona
Real Sociedad look keen to add a bit of respectability to the scoreline.
Carlos Fernandez calls Marc-Andre ter Stegen into action. It's easily smothered.
SUBSTITUTION
Real Sociedad 1-5 Barcelona
Sergino Dest will not be going for his hat-trick as he makes way for Trincao.
Riqui Puig is also on for Barca, with opening scorer Antoine Griezmann coming off.
SUBSTITUTION
Real Sociedad 1-5 Barcelona
More changes for Real Sociedad now.
Modibo Sagnan and Jon Bautista and introduced, with Igor Zubeldia and Alexander Isak replaced.
Post update
Real Sociedad 1-5 Barcelona
We have managed to go a few minutes without a goal now..
This comprehensive win will see Barcelona move back up to second place and to within four points of leaders Atletico Madrid.
SUBSTITUTION
Real Sociedad 1-5 Barcelona
Ousmane Dembele's night is done for Barcelona. He is replaced by Martin Braithwaite.
Just over 10 minutes remaining at Reale Arena.
GOAL - Real Sociedad 1-5 Barcelona
Ander Barrenetxea
The hosts have one back!
Sure, Barcelona have five but this from Ander Barrenetxea is just about the pick of the night.
He beats Marc-Andre ter Stegen with sheer power.
Post update
Real Sociedad 0-5 Barcelona
After Dembele added a fifth, Sociedad went for another change.
Carlos Fernandez came on for Martín Zubimendi.
GOAL - Real Sociedad 0-5 Barcelona
Ousmane Dembele
This one WILL count!
Ousmane Dembele has been particularly bright in the second half.
He picks the ball up a long way out and runs at Real Sociedad's defence.
He carves out space to shoot and beats Alex Remiro with a fine low finish into the far corner.
SUBSTITUTION
Real Sociedad 0-4 Barcelona
Barca now with their first change.
Ilaix Moriba comes on to replace Pedri.
Post update
Real Sociedad 0-4 Barcelona
It's a tight call, but ultimately he was just offside.
The goal doesn't count.
Video Assistant Referee
Real Sociedad 0-4 Barcelona
Could Ousmane Dembele have the goal he craves?
He sprints away and finishes clinically. But did he go too early?
We have ourselves a VAR check...
Post update
Real Sociedad 0-4 Barcelona
Ousmane Dembele goes for something spectacular... but just falls back to earth in a heap.
A neat ball is lifted into the area and Dembele gets himself in position to try an overhead kick. Problem is, a Real Sociedad head gets to the ball first and the Frenchman is left swinging at air.
SUBSTITUTION
Real Sociedad 0-4 Barcelona
Real Sociedad with a double substitution.
Andoni Gorosabel is replaced by Ander Barrenetxea, while Adan Januzaj comes on for Portu.
GOAL - Real Sociedad 0-4 Barcelona
Lionel Messi
Lionel Messi marks his record 768th Barcelona appearance with a goal. Of course he has!
Sergio Busquet threads the ball through the middle and Messi waits for the bounce and pokes it home.
GOAL - Real Sociedad 0-3 Barcelona
Sergino Dest
Sergino Dest again!
Jordi Alba forces his way into the area, takes the ball to the byeline and cuts it back for Dest who drills it home.